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#77040 - 04/18/01 01:31 AM garage outlets, 18" & h.w.exhaust  
lance763@hotmail.com  Offline
Junior Member
Joined: Apr 2001
Posts: 2
BM, Nev, USA
is there a code requirement to have receptacles 18" above the floor in a residential garage?

is there a code restriction that would not allow a garage gfci protected outlet from supplying a high efficiency hot water heater exhaust fan? i believe the gas supply to the w.h. will shut off automatically if the power is interrupted.


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#77041 - 04/18/01 08:19 AM Re: garage outlets, 18" & h.w.exhaust  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Lance,

I know of no height requirements for outlets in residential garages. But, the NEC is a minimum and it cannot take every circumstance into account. If you are installing or having outlets installed in a garage it would be a good extra precaution to take. Besides, having outlets at higher levels in a garage are more practical and easier to reach.

As for your second question, I am not familiar with this type of HW Heater. if you think that the fan turning off would cause problems or even be undesirable I would meke sure that it is not on a GFCI protected line. They do trip accidentally sometimes with power surges or storms. For this reason I personally will not put a refrigerator or freezer on a GFCI protected outlet if it can be avoided. Having it trip while you are away on vacation and all the food inside spoiling is something that doesn't have to happen.

[Linked Image]
Bill


#77042 - 04/18/01 04:36 PM Re: garage outlets, 18" & h.w.exhaust  
wayne  Offline
Member
Joined: Apr 2001
Posts: 54
NC
Lance,
There are no code requirement on the height of rec in a garage, However it is more practial to have then higher in a garage are for most people would have a work bench or something to work off of and a rec at least 42" above the floor works great. [Linked Image]

Far as for the second question. There are no code requirement on that either. If memory serves me right, on those types heaters they use an electric ignitors, unlike the older counter partner which used a thermocouplem and a pilot lite. so you would not have gas entering the burner unless called for and if in the case mention the gas would not necessary have to shut off. it just would not lite the burner to get hot untill the power was back on. The gas solenoid vale requires current before opening. I hope this is helful.
[Linked Image]
Wayne


#77043 - 04/19/01 08:01 AM Re: garage outlets, 18" & h.w.exhaust  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
I believe this may have something to do with potential accumulation of gasoline vapors, which are heavier than air, and would tend to lie low. I can't remember where I first heard this explanation though. And, I thought it was higher than 18".


#77044 - 04/19/01 09:28 AM Re: garage outlets, 18" & h.w.exhaust  
lance763@hotmail.com  Offline
Junior Member
Joined: Apr 2001
Posts: 2
BM, Nev, USA
the 97 UPC, plumbing code, 510.1 says to put ignition sources 18" or more above the floor and includes pilots, burners, and switches.

the 98 IMC, mechanical code, 304.2 says the same thing.

the NEC 210-52(g) on garages doesn't address this issue of vapors in a garage... when i wired in Oregon, it used to be a requirement by an NEC amendment. guess thats where i heard it.


#77045 - 04/19/01 11:38 AM Re: garage outlets, 18" & h.w.exhaust  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
lance,

The NEC does have very specific restrictions and requirements in Commercial garages and similar areas, but not for residential applications. Although it could always be a local amendment.

Bill


#77046 - 04/19/01 05:03 PM Re: garage outlets, 18" & h.w.exhaust  
Mike  Offline
Member
Joined: Feb 2001
Posts: 62
Why bury receptacles behind stuff stacked 3 feet or higher? Also, the higher the better for extension cords. Lowers the chances of damaging the cords.



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